[K/N][Tests] Move codegen test sources interfaceCallsNCasts..vector

^KT-61259

native/native.tests/testData/codegen/intrinsics/interop_convertSimple.kt

@@ -0,0 +1,14 @@
+
+@file:OptIn(ExperimentalForeignApi::class)
+import kotlin.test.*
+import kotlinx.cinterop.*
+
+fun box(): String {
+    assertEquals(1, 257.convert<Byte>())
+    assertEquals(255u, (-1).convert<UByte>())
+    assertEquals(0, Long.MIN_VALUE.narrow<Int>())
+    assertEquals(-1, Long.MAX_VALUE.narrow<Short>())
+    assertEquals(-1L, (-1).signExtend<Long>())
+
+    return "OK"
+}